Vibrations MCQ
Vibrations MCQ focuses on the fundamentals of mechanical vibrations such as free vibration, forced vibration damping the natural frequency of vibration, harmony and measurement of vibration. These questions are designed to be objective and beneficial in Mechanical Engineering students preparing for examinations such as GATE, SSC JE, RRB JE, ISRO, and other tests for competitive exams. Take these carefully-crafted MCQs to enhance your understanding and enhance test performance by providing accurate explanations.
Q2. Which type of vibration occurs without external force?
A. Forced vibration
B. Damped vibration
C. Free vibration
D. Random vibration
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Q3. Which parameter represents resistance to motion in vibration?
A. Mass
B. Stiffness
C. Damping
D. Frequency
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Q4. Natural frequency depends on which factors?
A. Mass and stiffness
B. Velocity only
C. Acceleration only
D. Load only
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Q5. What happens at resonance?
A. Amplitude decreases
B. Amplitude becomes zero
C. Amplitude becomes maximum
D. System stops
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Q6. Which vibration has constant amplitude?
A. Damped vibration
B. Free vibration without damping
C. Forced vibration
D. Random vibration
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Q7. Damping ratio is represented by which symbol?
A. ΞΆ (zeta)
B. Ξ± (alpha)
C. Ο (omega)
D. Ξ² (beta)
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Q9. Which material has high damping capacity?
A. Steel
B. Rubber
C. Aluminium
D. Copper
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Q10. Which term refers to opposition to acceleration?
A. Stiffness
B. Mass
C. Damping
D. Friction
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Q11. What is the equation of natural frequency for a spring-mass system?
A. Ο = k/m
B. Ο = β(m/k)
C. Ο = β(k/m)
D. Ο = k*m
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Q12. Which system has no energy loss?
A. Undamped system
B. Damped system
C. Forced system
D. Non-linear system
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Q13. Logarithmic decrement is used to measure:
A. Mass
B. Stiffness
C. Damping
D. Frequency
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Q14. Which vibration occurs due to external periodic force?
A. Free vibration
B. Forced vibration
C. Random vibration
D. Transient vibration
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Q15. In a vibrating system, stiffness provides:
A. Resistance to motion
B. Restoring force
C. Energy dissipation
D. Oscillation stopping
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Q16. What is mode shape?
A. Shape of structure
B. Deformation pattern during vibration
C. Static load shape
D. Material shape
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Q18. Which of the following increases natural frequency?
A. Increase mass
B. Decrease stiffness
C. Increase stiffness
D. Add damping
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Q20. Critical speed is related to:
A. Beam bending
B. Resonance in rotating shafts
C. Fluid flow
D. Heat transfer
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Q21. Damping force is proportional to:
A. Displacement
B. Velocity
C. Acceleration
D. Frequency
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Q22. Which system oscillates forever theoretically?
A. Damped system
B. Forced system
C. Undamped system
D. Non-linear system
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Q23. Which vibration is unpredictable in nature?
A. Free vibration
B. Forced vibration
C. Random vibration
D. Simple harmonic motion
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Q24. Which energy changes during vibration?
A. Heat to sound
B. Potential to kinetic
C. Chemical to mechanical
D. Electrical to mechanical
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Q25. Vibration amplitude is maximum at:
A. Zero frequency
B. High damping
C. Resonance
D. Critical damping
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Q26. Which component does not cause vibration?
A. Unbalance
B. Misalignment
C. Damping
D. Looseness
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Q27. What type of vibration occurs due to sudden impact?
A. Harmonic
B. Transient
C. Forced
D. Random
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Q28. Which factor reduces vibration amplitude?
A. High stiffness
B. High mass
C. High damping
D. Low damping
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Q29. The simplest form of vibration motion is:
A. Linear motion
B. Rotary motion
C. Simple harmonic motion
D. Random motion
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Q30. Which system stores energy?
A. Damping element
B. Mass element
C. Stiffness element
D. Both mass and stiffness
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